INTERIOR JAMBS
Flat Door Jambs
Simple yet effective, CTI flat jambs provide a straightforward, dependable solution for interior door framing. Milled to consistent dimensions in stable substrates, they install cleanly and deliver a reliable base for a wide range of standard interior door assemblies. A cost-effective, versatile option, flat jambs offer builders and manufacturers a clean, no-frills framing solution that performs reliably across everyday interior applications.
3 Substrate Options
8 Machining Options
10 Year Warranty
Sizes
Widths: 4 9/16" to 9 1/4"
Lengths: 6' 8" to 8'
Colors
Substrate Options
Pine
Pine is known for its versatility and workability. It offers excellent strength and stability, making it ideal for a wide range of construction and millwork applications.

LVL
LVL (Laminated Veneer Lumber) is an engineered wood product that offers superior strength and stability. It is composed of multiple layers of thin wood veneers, glued together to form a single, solid piece.

Java Hardwood
Java Hardwood is known for its rich color and natural beauty. It offers superior durability and resistance to wear, making it an excellent choice for high-end millwork.
_edited_edited.jpg)
Machining and Customization
CTI components are machined in-house to precise, repeatable tolerances and arrive prepped and ready to install.
Available operations include:
Head Dado
A precise dado cut at the head for a tight, accurate frame joint
Head and Sill Dado
Precise dado cuts for a tight frame joint.
Pre-Drill Head and Sill Dado
Pre-drilled locations for faster, consistent assembly.
Custom Length
Cut to your exact length, no field cutting.
Hinge Machined
Hinge locations routed and prepped to spec.
Strike Machined
Strike prep positioned for accurate latch alignment.
Mitering
Angled end cuts for seamless corner joints.
Pre-cut head
Head jamb cut to length ahead of assembly for a faster, precise fit
Frequently Asked Questions
What is a flat jamb?
A flat jamb is a simple, straightforward framing solution for interior doors, milled to consistent dimensions in stable substrates.
What are flat jambs used for?
They deliver a reliable base for a wide range of standard interior door assemblies.
Are flat jambs a cost-effective option?
Yes. Flat jambs offer builders and manufacturers a clean, versatile, no-frills framing solution that performs reliably in everyday interior applications.
Is this product covered by a warranty?
Yes. Every CTI product carries a 10-Year Manufactured Defect Warranty, ensuring it is free from material and workmanship defects under normal use.
Technical Details and Resources

Each CTI product comes with a 10 Year Manufactured Defect Warranty, ensuring they are free from material and workmanship defects under normal use for the product's lifetime. This commitment to quality offers you peace of mind and guarantees that you are investing in products built to last. You can view our product-specific warranties below.





